Interaction and coherence of a plasmon-exciton polariton condensate

Milena De Giorgi, Mohammad Ramezani, Francesco Todisco, Alexei Halpin, Davide Caputo, Antonio Fieramosca, Jaime Gomez-Rivas, Daniele Sanvitto

Research output: Contribution to journalArticleAcademicpeer-review

4 Citations (Scopus)

Abstract

Polaritons are quasiparticles arising from the strong coupling of electromagnetic waves in cavities and dipolar oscillations in a material medium. In this framework, localized surface plasmon in metallic nanoparticles defining optical nanocavities have attracted increasing interests in the past decade. This interest results from their sub-diffraction mode volume, which offers access to extremely high photonic densities by exploiting strong scattering cross sections. However, high absorption losses in metals have hindered the observation of collective coherent phenomena, such as condensation. In this work, we demonstrate the formation of a nonequilibrium room temperature plasmon-exciton-polariton condensate with a long-range spatial coherence, extending a hundred of microns, well over the excitation area, by coupling Frenkel excitons in organic molecules to a multipolar mode in a lattice of plasmonic nanoparticles. Time-resolved experiments evidence the picosecond dynamics of the condensate and a sizable blueshift, thus measuring for the first time the effect of polariton interactions in plasmonic cavities. Our results pave the way to the observation of room temperature superfluidity and novel nonlinear phenomena in plasmonic systems, challenging the common belief that absorption losses in metals prevent the realization of macroscopic quantum states.

LanguageEnglish
Pages3666-3672
Number of pages7
JournalACS Photonics
Volume5
Issue number9
DOIs
StatePublished - 19 Sep 2018

Fingerprint

Excitons
polaritons
condensates
Metals
excitons
Observation
Metal Nanoparticles
Optics and Photonics
Nanoparticles
Superfluid helium
Electromagnetic Radiation
Temperature
Electromagnetic waves
Photonics
Condensation
nanoparticles
cavities
superfluidity
Diffraction
interactions

Keywords

  • Bose-Eistein condensation
  • plasmonics
  • plexcitons
  • polaritons

Cite this

De Giorgi, M., Ramezani, M., Todisco, F., Halpin, A., Caputo, D., Fieramosca, A., ... Sanvitto, D. (2018). Interaction and coherence of a plasmon-exciton polariton condensate. ACS Photonics, 5(9), 3666-3672. DOI: 10.1021/acsphotonics.8b00662
De Giorgi, Milena ; Ramezani, Mohammad ; Todisco, Francesco ; Halpin, Alexei ; Caputo, Davide ; Fieramosca, Antonio ; Gomez-Rivas, Jaime ; Sanvitto, Daniele. / Interaction and coherence of a plasmon-exciton polariton condensate. In: ACS Photonics. 2018 ; Vol. 5, No. 9. pp. 3666-3672
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De Giorgi, M, Ramezani, M, Todisco, F, Halpin, A, Caputo, D, Fieramosca, A, Gomez-Rivas, J & Sanvitto, D 2018, 'Interaction and coherence of a plasmon-exciton polariton condensate' ACS Photonics, vol. 5, no. 9, pp. 3666-3672. DOI: 10.1021/acsphotonics.8b00662

Interaction and coherence of a plasmon-exciton polariton condensate. / De Giorgi, Milena; Ramezani, Mohammad; Todisco, Francesco; Halpin, Alexei; Caputo, Davide; Fieramosca, Antonio; Gomez-Rivas, Jaime; Sanvitto, Daniele.

In: ACS Photonics, Vol. 5, No. 9, 19.09.2018, p. 3666-3672.

Research output: Contribution to journalArticleAcademicpeer-review

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AU - Ramezani,Mohammad

AU - Todisco,Francesco

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AU - Fieramosca,Antonio

AU - Gomez-Rivas,Jaime

AU - Sanvitto,Daniele

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De Giorgi M, Ramezani M, Todisco F, Halpin A, Caputo D, Fieramosca A et al. Interaction and coherence of a plasmon-exciton polariton condensate. ACS Photonics. 2018 Sep 19;5(9):3666-3672. Available from, DOI: 10.1021/acsphotonics.8b00662